uraninite

noun ura·ni·nite \ yu̇-ˈrā-nə-ˌnīt \

Definition of uraninite

: a black octahedral mineral that consists of an oxide of uranium which usually contains thorium, lead, and rare earth elements and is the chief ore of uranium

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Origin and Etymology of uraninite

German Uranin uraninite (from New Latin uranium) + English -ite

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First Known Use: 1879

in the meaning defined above

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Medical Dictionary

uraninite

noun ura·ni·nite \ yu̇-ˈrā-nə-ˌnīt \

medical Definition of uraninite

: a mineral that is basically a black octahedral or cubic oxide of uranium containing lead, thorium, and rare earth elements and that is the chief ore of uranium